package com.itheima.web.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import java.io.IOException;


// @WebFilter("/index.jsp")
@WebFilter("/*")
public class FilterDemo2 implements Filter {

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        // 1. 放行前，对 request 数据进行处理

        System.out.println("2. FilterDemo....");

        // 放行
        chain.doFilter(request, response);

        // 2. 放行后，对 response 数据进行处理

        System.out.println("4. FilterDemo....");

    }
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void destroy() {

    }
}
